Fuel-saving device



T. ROBINSON FUEL SAVING DEVICE Filed April 10, 1926 /76. 3. mmasfimsonPatented Dec. 7 1926.

UNITED STATES THOMAS HARTLEY ROBINSON, 0F STRATFOBD, ONTARIO, CANADA.

FUEL-SAVING DEVICE.

Application filed April 10,

My invention relates to improvements in fuel saving devices, and theobject of the invention is to devise simple means for evenlysuperheating air to discharge it over the incandescent fuel bed toproduce secondary combustion, and it consists essentially of thearrangement and construction of parts as hereinafter more particularlyexplained.

Fig. l is a sectional plan view taken through a furnace fire pot showingmy device in position.

Fig. 2 is a vertical section through Figure 1 showing my device inelevation.

' Fig. 3 is an enlarged sectional plan view through my device.

Fig. 4 is a front elevation of my device.

In the drawing like characters of reference indicate corresponding partsin each figure.

1 indicates a furnace fire pot provided with the usual fire door 2provided with an air damper 3 through which a controlled supply of airis passed in the usual manner into the interior of the fire pot. 6 is astem like member provided with an end flange 7 which is bolted to thefire door 2. The outer end of the stem 6 is provided with an opening 8which registers with the air opening formed in the fire door, the sidesof such opening preferably converging as indicated at 8 and 8 to form anarrow mouth 9. 10 is a screw which extends through the top of the stem6 extending vertically of the mouth 9 so as to control the size of suchmouth and consequently the supply of air into the body of the stem. 10and 11 are zigzag passageways, the arms of which are in longitudinalalignment one with the other to form mouths 12, 13, 1d and 15. The airis finally discharged through a mouth 16 at the inner end of the stem.

When the device is placed in position within the furnace as shown inFigures 1 and 2 and the damper 3 is opened to permit the passage of airtherethrough such air passes through the mouth 9 part flowing i onedirection and part flowing in the opposite direction as indicated byarrow, such air streams meeting and crossing each other as alsoindicated by arrow at the mouth 12 1926. Serial No. 101,131.

so that as the air is gradually heated it is m xed and thereby insuringthat the air is raised to an even temperature as it passeslongitudinally of the stem, the streams of air crossing and recrossingat the mouths 18, 14 and 15 to be finally discharged over the fire bedat 16. Such superheated air mixes with the products of combustion toproduce a secondary combustion and thereby utilize gases for heatingpurposes which ordinarily pass off.

From this description it will be seen that I have devised a very simpledevice whereby air may be evenly and thoroughly superheated anddischarged in a superheated condition over the fire bed to unite withthe products of combustion.

What I claim as my invention is:

1. In a furnace, the combination with the fire door having an air inletdamper, of a hollow stem extending from the inlet of the damper andhaving a plurality of passages extending therethrough so arranged as todivide the flow of air into a plurality of streams which cross andrecross each other at spaced intervals apart during its passage towardsthe discharged end of the stem.

2. In a furnace, the combination with the fire door having an air inletdamper, of a hollow stem extending from the inlet of the damper andhaving a plurality of passages extending therethrough so arranged as todivide the flow of air into a plurality of streams which cross andrecross each other at spaced intervals apart during its passage towardsthe discharged end of the stem, and means for controlling the flow ofair into such passages.

3. The combination with a furnace fire pot and fire door having an airinlet damper therein, of a hollow stein supported by the fire door so asto receive air from the damper and having passages formed thereinarranged in diamond shaped formation to divide the fiow of air intostreams which cross and recross at spaced apart intervals during itspassage from one end of the stem to the other.

THOMAS HARTLEY ROBINSON.

